JP2012245592A - Machining tool for vertical cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machining tool that stably fixes a workpiece to a table and machines the workpiece with excellent accuracy even when the outer diameter of the workpiece is larger than the outer diameter of the table of the vertical cutting device.SOLUTION: The machining tool 1 includes a tool body 6 having a circular outer shape in plan view, a placing surface 7 which is formed on an upper surface of the tool body 6 to place a workpiece W thereon, a bolt insertion hole 8 (a fixing part) for fixing the workpiece W placed on the placing surface 7, and an outer periphery fixing part 12 provided on an outer peripheral part of the tool body 6 so as to be chucked in the radial direction by a chucking claw 13 installed on a table 3. The outer diameter D1 of the outer periphery fixing part 12 is set to be smaller than the outer diameter D2 of the placing surface 7 and the maximum chucking diameter D3 of the chucking claw 13.

Description

  The present invention relates to a vertical cutting device that is interposed between a table and a workpiece (workpiece) and stably fixes the workpiece to the table in a vertical cutting device such as a vertical lathe or vertical milling machine. The present invention relates to a processing jig of the apparatus.

  For example, as disclosed in Patent Document 1 and the like, the vertical lathe is provided with a circular table, which is provided with 3 to 4 chuck claws. The workpiece to be cut is chucked from the outer peripheral side by these three to four chuck claws, fixed on the table, rotated by being driven to rotate, and cut by a cutting tool such as a cutting tool.

  For example, when cutting a large disk-shaped workpiece with a diameter of more than 1 meter, if the workpiece is not firmly attached and fixed to the table, the workpiece will be lifted from the table during cutting, and the machining accuracy will be reduced. descend. However, in order to do so, fixing bolt holes must be drilled in the table in accordance with the shape of the workpiece, and the versatility of the table is impaired.

  For this reason, in general, a disk-shaped processing jig that is slightly larger in size according to the shape of the work is formed, the work is bolted to the upper surface of the processing jig, and the processing jig is then turned to a vertical lathe. It is set up on the table and chucked with a plurality of chuck claws provided near the outer periphery of the table.

JP-A-9-323232

  However, when the outer diameter of the workpiece is large enough to be comparable to the outer diameter of the table, the processing jig for holding the workpiece is also increased in diameter, making it difficult to attach the processing jig to the table. In other words, when chucking the processing jig from the outer peripheral side with a plurality of chuck claws, the chuck claws must be retracted to a position that protrudes from the outer peripheral contour of the table, thereby fixing the base of the chuck claws to the table. Therefore, it is impossible to tighten all the fixing bolts, and the position of the chuck claw may be shifted with respect to the table during the processing of the workpiece.

  In order to securely fix the processing jig to the table, it is necessary to make the outer diameter of the processing jig sufficiently smaller than the outer diameter of the table and chuck the processing jig without protruding the chuck jaws from the table. However, in this case, the workpiece protrudes with respect to the outer diameter of the processing jig, and there is a concern that the processing accuracy of the workpiece at the time of cutting decreases.

  The present invention has been made in view of the above problems, and even when the outer diameter of the workpiece is larger than the outer diameter of the table of the vertical cutting apparatus, the workpiece is stably fixed to the table and processed with high accuracy. It is an object of the present invention to provide a machining tool for a vertical cutting apparatus.

In order to solve the above problems, the present invention employs the following means.
That is, the first aspect of the processing jig of the vertical cutting apparatus according to the present invention is a processing jig that is placed on the table of the vertical cutting apparatus and the workpiece is fixed on the upper surface of the processing jig. And a jig body having a circular outer shape in plan view, a placement surface formed on the upper surface of the jig body and on which the workpiece is placed, and the placement surface placed on the placement surface A fixing portion for fixing a workpiece; and an outer peripheral fixing portion provided on an outer peripheral portion of the jig body to be chucked in a radial direction by a chuck claw installed on the table, and the outer peripheral fixing portion The outer diameter is smaller than the outer diameter of the mounting surface.

  In the above configuration, the workpiece is placed on the placement surface formed on the upper surface of the jig body, and the workpiece is fixed to the placement surface by the fixing portion provided on the jig body. Then, the jig body on which the workpiece is placed in this way is placed on the table of the vertical cutting apparatus, and the outer periphery fixing portion provided on the outer periphery of the jig body is a plurality of chucks installed on the table. The jig for processing is fixed on the table together with the work by being chucked by the claws from the radially outer side toward the inner side.

  Since the outer diameter of the outer peripheral fixing portion of the jig body is smaller than the outer diameter of the mounting surface, the mounting surface protrudes above the chuck claws that chuck the outer peripheral fixing portion. Therefore, when the outer diameter of the workpiece is the same size as the outer diameter of the mounting surface, the chuck claw enters the inside of the outer peripheral contour of the workpiece in plan view. For this reason, even if a workpiece comparable to the outer diameter of the table or exceeding the outer diameter of the table is mounted on the mounting surface, the chuck claw does not have to be retracted to the position where it protrudes from the table as in the past. Well, the chuck pawl can be securely fastened to the table with a specified number of bolts. Therefore, it is possible to prevent the position of the chuck claw from being displaced with respect to the table during processing of the workpiece, and to stably fix the workpiece to the table for processing with high accuracy.

  Furthermore, by taking a large difference between the protruding amount of the mounting surface, that is, the outer diameter of the outer peripheral fixed portion and the outer diameter of the mounting surface, even a workpiece having an outer diameter exceeding the outer diameter of the table can be stabilized. It becomes possible to fix to a table, and this can be processed accurately.

  Further, according to a second aspect of the processing jig of the vertical cutting apparatus according to the present invention, in the first aspect, the outer diameter of the outer peripheral fixing portion is smaller than the maximum chucking diameter of the chuck pawl. Features.

  According to the above configuration, since the plurality of chuck claws for fixing the processing jig to the table do not protrude from the outer peripheral contour of the table, each chuck claw is securely fastened to the table with the specified number of fixing bolts. The processing jig and the workpiece can be fixed to the table with stability by the chuck claws, and the workpiece can be processed with high accuracy.

  Moreover, the 3rd aspect of the processing jig of the vertical cutting device which concerns on this invention is a center hole formed in the center part of the said jig | tool main body in the said 1st or 2nd aspect, The said center hole And an inner circumferential stepped portion on which a fixture installed on the table is hooked.

  According to the above configuration, as described above, the chuck claw installed on the table chucks the outer periphery fixing portion of the jig main body, and at the same time, the fixing device installed on the table is hooked on the inner peripheral step portion of the jig main body. And by fastening a fixing tool, both the outer peripheral part and inner peripheral part of a jig | tool main body can be fixed to a table. Thereby, the processing jig can be stably fixed to the table, and the workpiece can be processed with high accuracy.

  Moreover, the 4th aspect of the processing jig of the vertical cutting device which concerns on this invention is a said 3rd aspect. WHEREIN: The said internal peripheral step part extends along the circumferential direction to the internal peripheral surface of the said center hole. It is the lower surface of the inner peripheral groove formed as described above.

  According to the above configuration, the mounting surface protrudes above the fixture hooked to the inner circumferential stepped portion, and the fixture is more peripheral than the inner peripheral portion of the mounting surface (center hole) in plan view. It becomes a mode that protrudes. For this reason, the inner diameter of the center hole can be reduced to increase the area of the mounting surface, the workpiece can be fixed to the processing jig with good stability, and the workpiece can be processed with high accuracy.

  As described above, according to the processing jig of the vertical cutting apparatus according to the present invention, even when the outer diameter of the workpiece is larger than the outer diameter of the table of the vertical cutting apparatus, the workpiece is stably attached to the table. It can be fixed and processed with high accuracy.

It is a longitudinal section showing a state where a processing jig concerning one embodiment of the present invention was installed on a table of a vertical cutting device with a work. It is a top view of the processing jig and table by the II-II arrow of FIG. It is a longitudinal cross-sectional view of the single piece of a processing jig. It is a longitudinal cross-sectional view which expands the IV section of FIG. 1 and shows one Embodiment of this invention. It is a longitudinal cross-sectional view which follows the VV line of FIG. It is a longitudinal cross-sectional view which follows the VI-VI line of FIG.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows a state where a processing jig 1 according to an embodiment of the present invention is installed on a table (bed) 3 of a vertical lathe 2 (vertical cutting device) together with a workpiece W (workpiece). It is a longitudinal cross-sectional view shown.

  The workpiece W shown here is a donut-shaped disc-shaped spacer component having a large outer diameter of about 1500 mm, for example. As shown in FIG. 2, the processing jig 1 and the table 3 are also circular. The workpiece W is fixed on the table 3 via the processing jig 1, rotates together with the table 3, and is cut in the thickness direction by a cutting tool 4 such as a cutting tool.

  As shown in FIGS. 2 and 3, the processing jig 1 includes a jig body 6 having a circular outer shape in plan view, and a workpiece W is placed on the upper surface of the jig body 6. A flat mounting surface 7 is formed. For example, 24 bolt insertion holes 8 (fixing portions) are provided along a pitch circle having a predetermined radius from the center of the jig body 6 in order to fix the workpiece W placed on the placement surface 7. It has been drilled. On the other hand, as shown in FIG. 1, a female screw hole 9 is formed in the workpiece W at a position aligned with the bolt insertion hole 8 of the jig main body 6, and is inserted into the bolt insertion hole 8 of the jig main body 6 from below. The fixed bolt 10 is fastened to the female screw hole 9 of the workpiece W, whereby the workpiece W is fixed on the mounting surface 7 of the jig body 6 and integrated with the processing jig 1.

  An outer periphery fixing portion 12 is formed on the outer periphery of the jig body 6. The outer periphery fixing portion 12 is a portion that is chucked from the outside in the radial direction to the inside by the four chuck claws 13 installed on the table 3. As shown in FIG. 4, the outer diameter D <b> 1 of the outer periphery fixing portion 12 is set smaller than the outer diameter D <b> 2 of the placement surface 7. As an example, the outer diameter D2 of the mounting surface 7 is 1600 mm, and the outer diameter D1 of the outer peripheral fixing portion 12 is 1540 mm. Therefore, a step of 30 mm exists between the outer peripheral surface of the outer peripheral fixing portion 12 and the outer peripheral surface of the placement surface 7.

  As shown in FIGS. 1, 2, 4, and 5, chuck grooves 15 are formed on the upper surface of the table 3 at four positions at intervals of 90 °. A block-like chuck holder 16 is fitted in the chuck groove 15. The chuck holder 16 can slide along the chuck groove 15 and is fastened and fixed to the table 3 by, for example, four fixing bolts 17 at a predetermined position according to the outer shape of the article to be chucked. The chuck holder 16 is also formed with a slide groove 18 along the radial direction of the table 3, and the chuck claw 13 is fitted in the slide groove 18. The chuck claw 13 can move in the radial direction along the slide groove 18. The position of the chuck claw 13 with respect to the chuck holder 16 is adjusted by, for example, a screw feed mechanism 19 (see FIG. 5).

  When the processing jig 1 is installed on the table 3, the processing jig 1 is mounted by interposing a surface plate 21 (see FIG. 1) having a predetermined thickness between the table 3 and the processing jig 1. After the placement, the screw feed mechanism 19 is operated to slide the four chuck claws 13 toward the center of the table 3, and when the chuck claws 13 come into contact with the outer peripheral fixing portion 12 of the jig body 6, the screw feed is performed. By further tightening the mechanism 19, the processing jig 1 (the jig body 6) can be firmly chucked.

  As shown in FIG. 4, the outer diameter D <b> 1 of the outer periphery fixing portion 12 of the jig body 6 is set smaller than the maximum chucking diameter D <b> 3 of the chuck claw 13. As an example, while the maximum chucking diameter D3 is 1560 mm, the outer diameter D1 of the outer peripheral fixing portion 12 is 1540 mm as described above, and is 10 mm smaller in radius.

  On the other hand, as shown in FIGS. 1 to 3, a center hole 23 is formed at the center of the jig body 6. An inner diameter D4 (see FIG. 3) of the center hole 23 is set to 600 mm as an example. Further, an inner circumferential groove 24 is formed on the inner circumferential surface of the center hole 23 so as to extend along the circumferential direction. An inner diameter D5 of the inner circumferential groove 24 is set to 640 mm, for example. For this reason, a step of 20 mm exists between the inner peripheral surface of the center hole 23 and the inner peripheral surface of the inner peripheral groove 24. The lower surface of the inner circumferential groove 24 is an inner circumferential step portion 25.

  As shown in FIGS. 1 and 2, a through hole 27 is formed in the central portion of the table 3, and for example, four bolt locking grooves 28 extend radially from the inner peripheral surface thereof. As shown in FIG. 6, the heads of stud bolts 29 are slidably inserted into these bolt locking grooves 28. Since the head of the stud bolt 29 is locked to the step inside the bolt locking groove 28, the stud bolt 29 does not come out upward, but can slide along the longitudinal direction of the bolt locking groove 28. .

  A through hole 32 (see FIG. 6) formed in an intermediate portion of the bar-shaped fixture 31 is inserted into the shaft portion of the stud bolt 29. One end of the fixture 31 is hooked on the inner peripheral step 25 of the center hole 23 (inner peripheral groove 24) of the jig body 6. In addition, the other end of the fixture 31 is placed on a hook member 33 erected on the upper surface of the table 3. A nut 34 is screwed onto the shaft portion of the stud bolt 29, and the nut 34 is fastened to the fixture 31. As a result, a force that pushes down the fixture 31 is generated, and the vicinity of the center hole 23 of the processing jig 1 is firmly pressed against the table 3 and fixed by this force.

  In the processing jig 1 configured as described above, the portion of the outer peripheral fixing portion 12 of the jig main body 6 is directed from the radially outer side to the inner side by the four chuck claws 13 provided on the outer peripheral portion of the table 3. The inner peripheral step 25 provided in the center hole 23 of the jig body 6 is fixed by the four fixing tools 31 provided near the center of the table 3. The table 3 can be securely fixed without causing a positional shift.

  As shown in FIG. 4, the processing jig 1 is configured so that the outer diameter D1 of the outer peripheral fixing portion 12 of the jig body 6 is set smaller than the outer diameter D2 of the mounting surface 7. The mounting surface 7 protrudes above the chuck claw 13 that chucks 12. Therefore, when the outer diameter of the workpiece W is the same size as the outer diameter of the mounting surface 7, the chuck claw 13 enters the inside of the outer contour of the workpiece W in plan view.

  For this reason, even if the workpiece W having a size comparable to the outer diameter of the table 3 is placed on the placement surface 7, it is not necessary to retract the chuck claw 13 to the position where it protrudes from the table 3 as in the prior art. The chuck claw 13 can be securely fastened to the table 3 with a specified number of fixing bolts 17. Therefore, it is possible to prevent the position of the chuck claw 13 from being shifted with respect to the table 3 during the processing of the workpiece W, and to stably fix the workpiece W to the table 3 and perform the processing with high accuracy.

  Further, the workpiece having an outer diameter exceeding the outer diameter of the table 3 by taking a large difference between the amount of overhang of the mounting surface 7, that is, the outer diameter D1 of the outer peripheral fixing portion 12 and the outer diameter D2 of the mounting surface 7. Even if it exists, it becomes possible to fix to the table 3 stably, and this can be processed accurately.

  Further, since the outer diameter D1 of the outer periphery fixing portion 12 is set smaller than the maximum chucking diameter D3 of the chuck claw 13, a plurality of chuck claws 13 for fixing the processing jig 1 to the table 3 are provided on the table 3. Does not protrude from the outer contour. For this reason, each chuck claw 13 is securely fastened to the table 3 with a specified number (four in this case) of fixing bolts 17, and the processing jig 1 and the workpiece W are attached to the table 3 by these chuck claws 13. The workpiece W can be processed with high accuracy by fixing with good stability.

  Further, a center hole 23 formed at the center of the jig body 6 and an inner peripheral step 25 formed on the inner periphery of the center hole 23 to which the fixture 31 installed on the table 3 is hooked. Therefore, the chuck claw 13 installed on the table 3 is chucked on the outer peripheral fixing portion 12 of the jig main body 6 to fix the outer peripheral portion of the jig main body 6, and at the same time, the fixing installed on the table 3 is fixed. The inner peripheral portion of the jig body 6 can be fixed to the table 3 by hooking the tool 31 on the inner peripheral step portion 25 of the jig body 6 and fastening the fixing tool 31 with the stud bolt 29 and the nut 34. Thus, since both the outer peripheral part and inner peripheral part of the jig | tool main body 6 can be fixed to the table 3, the jig | tool 1 for a process is stably fixed with respect to the table 3, and the workpiece | work W is accurate. Can be processed.

  Further, since the inner circumferential step portion 25 is a lower surface of the inner circumferential groove 24 formed to extend along the circumferential direction on the inner circumferential surface of the center hole 23, as shown in FIG. The mounting surface 7 protrudes above the fixture 31 hooked by the portion 25, and the fixture 31 is more than the inner peripheral portion of the mounting surface 7 (center hole 23) in plan view (see FIG. 2). It becomes the aspect which protrudes on the outer peripheral side. For this reason, the inner diameter of the center hole 23 can be reduced and the area of the mounting surface 7 can be increased. If the area of the mounting surface 7 is increased, the workpiece W can be fixed to the processing jig 1 with good stability and processed with high accuracy.

  It should be noted that the present invention is not limited to the above-described embodiments, and can be appropriately modified without departing from the gist of the present invention. For example, in the above embodiment, the processing jig 1 is installed on the rotary table 3 of the vertical lathe 2, and the workpiece W placed on the processing jig 1 rotates together with the processing jig 1. In this embodiment, the cutting tool 4 is cut by a fixed cutting tool 4, and the processing jig 1 is installed on a fixed table (bed) such as a vertical milling machine, and a rotary cutting tool is mounted on the workpiece W. It is good also as an aspect which performs the cutting process of W. Further, the structure, position, quantity, and the like of the chuck claw 13 and the fixture 31 on the table 3 side described in the above embodiment may be changed.

1 Processing Jig 2 Vertical Lathe (Vertical Cutting Device)
3 Table 6 Jig body 7 Placement surface 8 Bolt insertion hole (fixed part)
9 Female screw hole 10 Fixing bolt 12 Outer peripheral fixing part 13 Chuck claw 23 Central hole 24 Inner peripheral groove 25 Inner peripheral step part 31 Fixing tool D1 Outer diameter of outer peripheral fixing part D2 Outer diameter of mounting surface D3 Maximum chucking diameter W Workpiece

Claims (4)

A processing jig that is placed on a table of a vertical cutting apparatus and a workpiece is fixed to the upper surface of the processing jig and is cut,
A jig body having a circular outer shape in plan view;
A mounting surface formed on the upper surface of the jig body and on which the workpiece is mounted;
A fixing portion for fixing the work placed on the placement surface;
An outer peripheral fixing portion provided on an outer peripheral portion of the jig main body to be chucked in a radial direction by a chuck claw installed on the table,
A processing jig for a vertical cutting apparatus, wherein an outer diameter of the outer peripheral fixing portion is smaller than an outer diameter of the mounting surface.   The processing jig of the vertical cutting apparatus according to claim 1, wherein an outer diameter of the outer peripheral fixing portion is smaller than a maximum chucking diameter of the chuck claws. A center hole formed in the center of the jig body;
The vertical cutting device according to claim 1, further comprising: an inner circumferential stepped portion formed on an inner circumferential portion of the center hole and on which a fixture installed on the table is hooked. Processing jigs.   The said internal peripheral level | step-difference part is a lower surface of the internal peripheral groove | channel formed so that it might extend along the circumferential direction in the internal peripheral surface of the said center hole, The process of the vertical cutting apparatus of Claim 3 characterized by the above-mentioned. Jig.

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